Oil cooler



FIG. 1 is a bottom elevation view of the oil cooler according to my invention;

FIG. 2 is a rear elevation view of the oil cooler of FIG. 1;

FIG. 3 is a top elevation view of the oil cooler of FIG. 1;

FIG. 4 is a left side elevation view of the oil cooler of FIG. 1;

FIG. 5 is a right side elevation view of the oil cooler of FIG. 1; and,

FIG. 6 is a front elevation view of the oil cooler of FIG. 1. 

The ornamental design for an oil cooler, as shown. 